{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfc16038e4218a61d6a45f4f629c7ebca826f74092d1bcac0a437e27674be7c8d",
    "signature": "0xf6e0e8225110c163a921eaa1377ec96698af92bd549f26deffa256917a3b06c42e5990613a6c1cef64abc612b1ab6de690fa880937a9db0c1ec6ee94ab10f4701b",
    "signer": "0x8aB7d23D8c6Ea85540aDABD8Ef54b78eDDF14A7B",
    "userId": "709218456"
  }
}